Helmet



FIG. 1 is a front elevational view of a first embodiment;

FIG. 2 is a left side elevational view thereof, the right side being identical to that of the left side;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The face shield shown in broken lines is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a helmet, as shown. 